A wooden object from a prehistoric site has a carbon-14 activity of 10 counts per minute (CPM) compared to 40 CPM for new wood. If carbon-14 has a half-life of 5730 years, what is the age of the wood?

Q: An animal skeleton has a carbon-14 decay rate of 11.1 disintegrations per minute per gram of carbon.…

A: given: carbon-14 has a half-life = 5730 yrs  carbon-14 decay rate = 11.1 disintegrations carbon-14…

Q: A normal adult jawbone contains 200mg of Carbon-14 in a living person. If scientists found a jawbone…

A: Calculate the value of rate constant (k):

Q: A precursor of modern-day bison is Bison latifrons. A fossil found in North Dakota was dated with…

A: Given that : The half-life of 14C is 5730 years. The initial concentration of 14C is 100 %. Out of…

Q: carbon from a cypress beam obtained from the tomb of an ancient egyptian king gave 9.2…

A: The decay constant can be calculated as

Q: Phosphorus-32 is a radioactive isotope with a half-life of 14.3 d (d = days). A biochemist has a…

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Q: Suppose the amount of a certain radioactive substance in a sample decays from 4.60 mg to 1.90 mg…

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Q: if the passing of five half -life leaves 50.0g of a of radioisotope sample, how much was present in…

A: Mass of sample after 5 half life = 50 g Initial amount = ?

Q: A bone has a carbon-14 decay rate of 4.85 disintegrations per minute per gram of carbon. If a living…

A: Given : Decay rate of carbon-14 in bone = 4.85 disintegration per minute per gram of carbon Decay…

Q: Fluorine-18, which has a physical half-life of 110 min, is used in PET scans. if 1.00g of…

A: The fluorine-18 sample was shipped at 5:00 PM and arrives the laboratory at 9:30 AM in the next…

Q: Uranium-240 has a half-life of 14.1 hours (note this is NOT a fissionable isotope).  A country with…

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Q: Suppose that 10 units of beryllium are present in a living organism and that the half-life of…

A: Here i have calculated the age of material

Q: 1. A 1 kg mass of radioactive material was left to decay in a laboratory. After 12 years, the…

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Q: Carbon-14 has a half life of 5730 years. In a plant fossil, you find that the 14C has decayed to…

A: Given that, half life , t12= of 5730 years. and  14C has decayed to 1/8.00 of the original amount

Q: Ca-60 is used extensively in radiotherapy and its half-life is 5.27 years. How many years will it…

A: Given: half life, t12=5.27 years[A]=0.2[A]o To calculate: Years taken to decrease to 20% of its…

Q: A tiny piece of paper taken from the Dead Sea Scrolls has an activity of 10.8 disintegrations per…

A: Radioactive disintegration follows first order kinectics. Hence, the rate of decay can be followed…

Q: Approximately how many half-lives must pass for the amount of radioactivity in a substance to…

A: Given, radioactivity of the substance decreases below 1% of its initial level.The initial percentage…

Q: A wooden statue found in Egypt has a carbon-14 content that is three-fifths of that found in living…

A: Given: A wooden statue found in Egypt has a carbon-14 content that is three-fifths of that found in…

Q: Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the 14C has decayed to…

A: Given,                 Isotope = 14C                 Half life =5730 years                 Remaining…

Q: Carbon-14 has a half-life of 5730 years, how old is a dress that was found to have a specific…

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Q: A piece of charcoal from a tree killed by the volcanic eruption that formed the crater in Crater…

A: The radioactive decay follows first-order kinetics. We know that the half-life of carbon-14 is 5730…

Q: A 40.0 mg sample of a radioactive substance decays to 10.0 mg in 10 days. What is the half-life of…

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Q: A sample of wooden artifact is found to undergo 9.0 6C 1? disintegrations per minute per gram of…

A: Given: The activity of wood sample = 9.0 disintegrations per min. The activity of fresh wood = 15…

Q: A wooden artifact from an Indian temple has a 14C activity of 42 counts per minute as compared with…

A: The question is based on concept of radioactive decay. we have to calculate the age of the wooden…

Q: A sample of coral has a carbon-14 content of 12.5% the value of living coral.  If the half-life of…

A: Given  Half life of Carbon - 14 = 5730 years Remaining amount   = 12.5 %  Time ( t ) = ?

Q: Iodine-125 (125I) is used to treat, among other things, brain tumors and prostate cancer. It decays…

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Q: A fossilized bone is found to contain 1/1000 the original amount of C – 14. Determine the age of the…

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Q: The half life for the decay of carbon-14 is 5.73 x 10 years. Suppose the activity due to the…

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Q: What is C-14 activity in a sample that is 2.0 x 104 yr old? Assume that C-14 activity in the living…

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Q: In 1947 samples of the Dead Sea Scrolls were analyzed by carbon dating. It was found that the…

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Q: Archaeologists used pieces of burned wood, or charcoal, found at the site to date prehistoric…

A: Given data is as follows: The initial amount of C-14, A° = 100 The amount left after time "t" , A=…

Q: Cobalt-60 is radioactive and has a half life of 5.26 years. How long would it take a sample to decay…

A: Given- Half life=5.26 years  Initial amount=1.90mg Final amount=1.50mg

Q: The noble gas radon has been the focus of much attention because it may be found in homes. Radon-222…

A: Half life time = 3.82 days  Concentration decreases to 10% of original.  Let initial concentration =…

Q: 10. The 14C content of an ancient piece of wood was found to be one-sixteenth of that in living…

A: The question is based on the concept of carbon dating. We have been given the fraction of carbon…

Q: A sample of a wooden artifact gives 5.0 disintegrations/min/g carbon. The half-life of C-14 is 5730…

A: Half life is defined as the time taken by a radioactive sample to decay to half of its original…

Q: Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the 14C has decayed to…

A: For each half life, the specimen decays half the amount of initial amount.

Q: The half-life of a radioactive nucleus is 1.5·10 -8 s. What is this half-life in milliseconds (ms),…

A: The half-life of the given radioactive nucleus is 1.5×10-8 s. This half-life can be converted into…

Q: An archaeologist claims that a bone in her collection is from a saber-tooth tiger that is believed…

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Q: Carbon-14 dating is used to find the age of ancient objects. The half-life of Carbon-14 is 5730…

A: Given : Half life of Carbon-14 = 5730 years  And the piece of clay pot has undergone 1.5 half lives.…

Q: an artifiact has a carbon-14 concentration that is 12.5%(1/8th) of that found in living organisms.…

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Q: 4. The half-life of radioactive radium-224 is 3.50 days. What was the original mass if 0.200 g…

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Q: After 119 days have elapsed, 1/21 of a radioisotope sample remains undecayed. What is the half-life…

A: Suppose the initial amount of sample be Ao After 119 days, amount remaining, A = (1/21) Ao The…

Q: A certain radioisotope has a half-life of 9.54 days. What percentage of an initial sample of this…

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Q: Carbon-14 Half-Life 120 100 80 60 40 20 5000 10000 15000 20000 25000 80000 Time in Years If a…

A: The fossilized bone is found 1/8 ratio of carbon-14 to carbon-12. The approximate age of the bone…

Q: A bone has a carbon-14 decay rate of 4.98 disintegrations per minute per gram of carbon. If a living…

A: Solution : N0= 4.98 dpm N(t) = 15.3 dpm  t1/2 = 5715 years  t = ?

Q: The half life for the decay of carbon-14 is 5.73 x 10° years. Suppose the activity due to the…

A:

Q: Ca-60 is used extensively in radiotherapy, its half-life is 5.27 years. How many years will it take…

A: The given data is as follows: The half life Co-60 = 5.27 years The initial amount A∘= 100 The left…

Q: What is the approximate age of the artifact?

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Q: A 371.9 ng sample of an unknown radioactive substance was placed in storage and its mass measured…

A: On passing a half life the concentration of the substance becomes half. Let the substance has passed…